Supplemental Cash Flow Information (Tables)

3 Months Ended

Mar. 31, 2023

Supplemental Cash Flow Elements [Abstract]

Schedule of Noncash Investing and Financing Activities

Noncash investing and financing activities are as follows:

	Three Months Ended
	March 31,
	2023		2022
	(Dollars in Millions)
Accrued liabilities for purchases of property, plant and equipment	$	39.8	$	24.5
Remeasurement of operating lease right-of-use assets	$	0.5	$	0.3
Remeasurement of finance lease right-of-use assets	$	—	$	0.4
Right-of-use assets obtained in exchange for new    operating lease liabilities	$	13.8	$	6.1
Right-of-use assets obtained in exchange for    new finance lease liabilities	$	5.4	$	3.6
Acquisition of assets through asset exchange	$	5.2	$	—

Supplemental Disclosures of Cash Flow Information

Supplemental disclosures of cash flow information are as follows:

	Three Months Ended
	March 31,
	2023		2022
	(Dollars in Millions)
Cash paid for interest, net of capitalized amount	$	41.4	$	44.8
Cash paid for income taxes, net of refunds	$	4.1	$	0.8